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US3454538A
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Polymerization of olefinically unsaturated compounds using pi-olefin complexes as polymerization initiators
Assignee: BASF SE
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Filing: 1965-02-16
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Granted: 1969-07-08
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Expires: 1985-02-16
Abstract
No abstract record available.
Inventors
- 👤 Herbert Naarmann
- 👤 Hermann Pankraz Hofmann
- 👤 Ernst-Guenther Kastning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:39
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F4/00; C08F4/06; C08F4/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3379706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |